Think freezer friendly! Mini quiches, Muffins etc. Even sandwiches can be made in advance. I try to have a good supply of snacks int he freezer made up so then i can chuck them in and not worry about so much packaged stuff as i know exactly what is in them!

or other food like healthy sausage rolls that will freeze easily & can defrost in the lunch box. Fruit is always good, and frozen fruit juices are great in Summer. And a batch or two of healthy muffins or biscuits will see you through the week if you make them on the weekend.

we used to have a simple rotation of sandwiches, pita breads, cruskits and cold meats/salads and spreads. fresh fruit and yogurt and maybe a treat (brownie or biscuit). great idea for freezing muffins, slices and quiches too.